my $xref3 = $self->{oidx}->get_xref3($smsg->{num});
        my @keep = grep(!/:$smsg->{blob}\z/, @$xref3);
        if (@keep) {
+               warn "E: $smsg->{blob} gone, removing #$smsg->{num}\n";
                $keep[0] =~ /:([a-f0-9]{40,}+)\z/ or
                        die "BUG: xref $keep[0] has no OID";
                my $oidhex = $1;
                $self->{oidx}->remove_xref3($smsg->{num}, $smsg->{blob});
-               my $upd = $self->{oidx}->update_blob($smsg, $oidhex);
-               my $saved = $self->{oidx}->get_art($smsg->{num});
+               $self->{oidx}->update_blob($smsg, $oidhex) or warn <<EOM;
+E: #$smsg->{num} gone ($smsg->{blob} => $oidhex)
+EOM
        } else {
+               warn "E: $smsg->{blob} gone, removing #$smsg->{num}\n";
                $self->{oidx}->delete_by_num($smsg->{num});
        }
 }